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' 15 February 1999 <br /> AGE-NC Project No 96-0229 <br /> Page 5 of 9 <br /> 3.0• FINDINGS <br /> Soil descriptions were utilized to construct the cross sections presented in Figures 3, 4, 5 and 6 <br /> Laboratory analysis of ten soil samples detected volatile aromatics in two of the ten soil samples <br /> AGE was able to determine general ground water flow directiond gradient from ground water <br />' monitoring data Laboratory analysis of eleven ground water samples detected total petroleum <br /> hydrocarbons in nine of the eleven samples, volatile aromatics were detected in eight of eleven <br /> samples, fuel oxygenating compounds were detected in seven of the eleven ground water samples <br /> 1 <br /> 3 1 SOIL PROFILE <br /> Generally, graylbrown, very stiff to hard, fine sandy, silty clays were encountered between 15 feet <br /> bsg and 25 feet bsg A gray/brown, loose to dense, silty, fine to medium sand was generally <br /> encountered between 25 feet bsg to 35 feet bsg A brown/gray, loose to dense, silty/clayey, gravelly, <br /> fine to coarse sand was generally encountered at depths between 35 feet and 50 feet bsg A brown, <br /> fine sandy clayey silt was encountered at a depth of 55 feet bsg <br /> Saturated soil was encountered from borings MW-7, MW-8, MW-9 and MW-10 between 25 and 30 <br />' feet bsg Boring logs are included in Appendix A General lithology beneath the site In cross <br /> sectional view ;s depicted in Figures 3, 4, 5 and 6 <br />' 3 2 FIELD EVIDENCE OF HYDROCARBON-IMPACTED SOIL AND GROUND WATER <br />' Faint odor was noted in a soil sample duplicate collected from soil boring MW-7 at a depth of 35 <br /> feet bsg Organic vapor was detected from MW-7 soil sample duplicates at a depth of 35 feet bsg <br /> (using a FID) at a concentration as high as 12 parts per million (ppm) <br /> Intense petroleum hydrocarbon odor was detected in quarterly ground water samples collected from <br /> wells MW-1, MW-2, MW-3 and MW-6 Faint petroleum hydrocarbon odor was detected In ground <br /> water samples collected from wells MW-7 <br /> 33 GROUND WATER ELEVATION AND GRADIENT <br /> In October 1998, the depths to first encountered ground water in wells MW-1 through MW-10 <br /> ranged between 26 15 and 28 06 feet below the tops of well casings Ground water elevations were <br /> calculated between -15 43 and -16 73 feet below mean sea level, ground water elevations, as <br /> AAanced GeoEm ironmental,Inc <br /> 1 <br /> k <br />